Gut ash::MaterialDesignController, and remove the about:flags entry.

ash/test/ash_test_helper_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/test/ash_test_helper.h"
 
 #include "ash/test/ash_test_environment.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
 
 // Tests for AshTestHelper. Who will watch the watchers? And who will test
 // the tests?
 class AshTestHelperTest : public testing::Test {
  public:
   AshTestHelperTest() {}
   ~AshTestHelperTest() override {}
 
   void SetUp() override {
     testing::Test::SetUp();
     ash_test_environment_ = test::AshTestEnvironment::Create();
     ash_test_helper_.reset(
         new test::AshTestHelper(ash_test_environment_.get()));
-    ash_test_helper_->SetUp(true,
-                            MaterialDesignController::Mode::UNINITIALIZED);
+    ash_test_helper_->SetUp(true);
   }
 
   void TearDown() override {
     ash_test_helper_->TearDown();
     testing::Test::TearDown();
   }
 
   test::AshTestHelper* ash_test_helper() { return ash_test_helper_.get(); }
 
  protected:
@@ skipping 17 matching lines @@
   Widget::InitParams params;
   params.ownership = Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.context = ash_test_helper()->CurrentContext();
   w1->Init(params);
   w1->Show();
   EXPECT_TRUE(w1->IsActive());
   EXPECT_TRUE(w1->IsVisible());
 }
 
 }  // namespace ash